<template>
  <div class="container">
    <div class="item-a">header</div>
    <div class="item-b">main</div>
    <div class="item-c">sidebar</div>
    <div class="item-d">footer</div>
  </div>
</template>

<script>
export default {

}
</script>

<style>
.container {
  width: 100%;
  height: 100%;
  background:darkgray;
  display: grid;
  text-align: center;
  font-size: 20px;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 88px auto 88px;
  grid-template-areas: 
    "header header header header"
    "main main . sidebar"
    "footer footer footer footer";
}

.item-a {
  grid-area: header;
  background: chocolate;
  display: grid;
  align-items: center;
}
.item-b {
  grid-area: main;
  background: cornsilk;
}
.item-c {
  grid-area: sidebar;
  background: darkcyan;
}
.item-d {
  grid-area: footer;
  background: darkkhaki;
}

</style>